I have a server that is colocated, it's not on dynamic dns or at home. The colo facility gave me block of IPs:
xx.xx.xx.16/29:
xx.xx.xx.16 Subnet Address
xx.xx.xx.17 Router Address (as given by Colo)
xx.xx.xx.18 ISPConfig Install Address (server.dancingmokey.com)
xx.xx.xx.19 www.dancingmokey.com
xx.xx.xx.20 www.phoebesfriends.com
xx.xx.xx.21 not used
xx.xx.xx.22 not used
xx.xx.xx.23 Broadcast Address

So, .18:81 is running the ISPConfig interface with no problem.

.19 is running dancingmokey, no problem
.20 is running phoebesfriends, no problem

I try to setup another site (as has been suggested on this forum) for the subdomain and I get a "images.domain1.com" is already in use by another domain. Is this because I had at first set it up under the dancingmokey.com site and then removed it? ISPConfig shows no entries at all for images.dancingmokey.com and the DNS service has no entry for images.dancingmokey.com either, but when I do a lookup on it, it comes back as the .19 address. Oddly, the server.dancingmokey.com resolves to .19 as well.

I try to setup another site (as has been suggested on this forum) for the subdomain and I get a "images.domain1.com" is already in use by another domain. Is this because I had at first set it up under the dancingmokey.com site and then removed it? ISPConfig shows no entries at all for images.dancingmokey.com and the DNS service has no entry for images.dancingmokey.com either

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Please also check in ISPConfig's recycle bins. If you deleted that Co-Domain earlier, it's in a recycle bin now (unless you deleted it from there, too).

aranthorn said:

As far as the relay thing goes, I have no idea what to do. Email works just fine unless I'm replying to the "contact us" form, etc.

unfortunately, I'm my own hosting company. I use mydns.com as my dns provider. What record type should I be adding? A? CNAME? I already have the MX record there with them. Maybe it's easier if I just show what my DNS entires look like:

O.M.G. I truly think I'm an idiot at this point. I have ISPConfig setup to use itself as the DNS server while I have my registrar setup to use the mydomain.com service for DNS. I swear I don't do drugs. I wish I did, that would make things much easier to explain.

I need to setup ISPConfig to use NS1.MYDOMAIN.com and NS2.MYDOMAIN.COM just like I have it setup with my registrar or DNS is going to be ugly (like now for instance). Then I have to update the mydomain.com information to reflect the mailserver and subdomains correctly.

You mix up different things, dns records for domains and reverse records for IP addresses are different! You can never setup a reverse record for a IP yourself in your own dns server, as the reverse records are always handled by the company that assigned you the IP address.

So please do what falko suggested and ask the company that assigned you the IP address to set a reverse record for the IP that points to the domain name of your server.

You mix up different things, dns records for domains and reverse records for IP addresses are different! You can never setup a reverse record for a IP yourself in your own dns server, as the reverse records are always handled by the company that assigned you the IP address.

So please do what falko suggested and ask the company that assigned you the IP address to set a reverse record for the IP that points to the domain name of your server.

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I realize that, I thought it would be a good idea to straighten out the DNS first.

There are multiple IPs on the server and multiple domains on the server.
69.65.22.18 is server.dancingmokey.com
69.65.22.19 is www.dancingmokey.com with a images.dancingmokey.com subdomain
69.65.22.20 is phoebesfriends.com

I still have .21 and .22 addresses open for future use

So I am asking the company that assigned them (gigenet) for the following: